Air register



April 16, 1935. G. P. HAYNES AIR REGISTER Filed July 18,. 1934 2 Sheets-Sheet 1 Q mm.

e Hugh/r 7 M l ATTORNEY April ,16, 1935.` G. P. HAS/NES AIR REGISTER Filed July 18, 1934:

2 Sheets-Sheet 2 ATTORNEY Patented Apr. 16, 1935 UNITED ySTATES Am REGISTER George I. Haynes, Brooklyn, N. Y., assignor to Robins Dry Dock and Repair Co., Brooklyn,

N. Y., a corporation of New York Application July 18, '1934, Serial No. 735,733

7 Claims.

This invention relates to furnaces and my .improvements are directed more particularly to the means employed for admitting and controlling the directional flow of air for combustion within the furnace.

It is one of the objects of my invention to provide means for causing air to enter the register in a whirling flow and to be directed in spiral formation rearwardly into the furnace, without thefcreation of abrupt directional changes.

This object is accomplished by forming theregister wall of a series of overlapping louvers or hinged doors which are to be opened inwardly to admit streams of air over their outer surfaces, and curved vanes carried respectively by said doors, said vanes being provided with curvilinear or scoop-like inner surfaces that translate the air streams into a rearwardly directed spiral air flow. f i

- The scoop-like vanes are set at an angle which causes the air streams, deected thereby, to intersect the fuel issuing from an atomizer in a vertical plane adjacent the flame cone or diffuser that is mounted on the burner tube, thereby locating the main combustion zone near the point of fuel issuance. By these means more complete combustion of the fuel occurs at the genesis or root of name propagation, which results in the creation of a relatively short, bushy flame of high'efficiency.

' My improved register may be composed of sheet metallic material in the interest of lightness in weight as compared with a cast iron construction, this sheet metallic formation also lending itself to relative economy in production.

Other features and advantages of iny invention will hereinafter appear.

In the drawings: i

Figure 1 is a front elevation of an air register constructed according to my invention and here shown as bolted to a boiler front plate.

Fig. 2 is a side sectional view, taken on th line 2-2 of Fig. 1.

Fig. 3 is a sectional view, taken on the line 3 3 of Fig. 2.

Fig. 4 is a sectional detail of the limiting stop assembly, taken on the line 4 4 of Fig. 1.

Fig. 5 is a diagrammatic View showing the hinged doors or sections with their scoop-like vanes in an open position, indicating the flow course of air streams in theregister, and

Fig. 6r is a detail of an adjustable vane.

In said gures let I indicate a boiler front plate to which is secured, as by bolts `2, the base frame 3 of the air register.

(Cl. 15S-1.5)

Said frame 3 isV of sheet material and is in the form ofa lhexagonal annulus, having an opening 4 to receive the throat ring 5, which latter is also of sheet materialand is constricted rearwardly, said throat ring being the means of communica-l tion between theregister and-furnace interior, through the usual Venturi bricking, which is'indicated at X. j

The annulus 3 is provided with an inturned, peripheral flange 6 which lies against the boiler plate I, leaving a clearance between saidannulus and plate. n

A series of bolts 1 which connect annulus 3` with a front plate 8 of the register aresecured thereto by nuts 9 and I0 respectively, the nuts 9 and the inner endsof the bolts being accommodated in the clearance aforesaid. The hexagonal shape of base frame 3 permits the bolts 2 -to` be positioned in the frame apices II, and allows the assembly upon a boiler front of a number of registershaving similarly shaped base frames, as indicated in dotted lines' at I2 on Fig. 1, whereby a plurality of registers can be more compactly accommodated on a boiler front than would be the case if the base frame were circular in form.

The wall of the register is composed of a series of hinged doors or segments I3, which may bek of sheet material, each shaped, as shown, as a segment of the wall contour, and havingvat its root a tubular formation, indicated at I4, whereby said doors may respectively be mounted pivotally upon the bolts 'I. Y I

Each door is positioned so that its free end ynormally overlaps inwardly the'pivotal or root portion of the next succeeding door, thus restraining it from outward movement, while leaving it free to open inwardly, it being the function of the doors to open in this manner unitedly for the admission of air. It will be appreciated that with the doors open,as indicated for example in Fig. 5, streams 'of air will enter the register with a circulatory motion, flowing over the outer surfaces of said doors. Each door carries at its inner surface a vane I5, whose inner surface is curvilinear and of scoop-like contour, which sur-v face receives the air stream from the outer surface of the next preceding door and translates the purely circulatory motion thereof into a rearwardly directed spiral ow that surrounds the fuel sprayfrom the atomizer.

The front plate 8 of the register which has a central opening'l, is provided with an annular series of concentric slots I1, and a'ring I8 that is rotatable about rollers I9, 25, pivoted on plate 8, carries pins 2I which areentered in said slots,

to be capable of movement therein. The doors I3 each have an inwardly projecting lug 22 that is provided with an angularly disposed slot 23 and the pins 2|are respectively entered within said slots 23, to the end that the rotation of ring I8, which carries pins ZI, will cause said pins, while moving through the concentric slots I'I, in xed plate 8, to either open or close the doors I3 while travelling in the angularly disposed slots 23.

These slots 23 have a slight oiset 24 at their forward ends in which ends the pins 2I are located when the doors I3 are closed, these oisets serving as locking means to prevent outside pres-.

sure from opening the doors. But with the doors open, and the pins then located in rearward portions of slots 23, the effect of pressure from within the register as by an explosion therein, will be to close the doors and thus prevent expulsion of burning gases into the fire room.

It will be noted that while the rollers I9 are flanged, for positioning the ring I8, the roller is plain, but an operating lever for ring I8 is mounted on the same pivot 26 as roller 20 and itself serves to position the ring at that point.

' The levei` 25 hasa longitudinal slot 21 therein, and a pin 28 that projects from ring I8 is entered within said slot so that movement ofthe lever about its pivot 26 is permitted and will rotate the ring thereby serving to open or close the door.

Adjustably mountedon the ring I8 is a stop device 29 which is adapted to co-act with a pawl 3D that is pivoted at 3-I on the front plate 8, said pawl lying in the path of rotation of said stop device to limit its extent of movement and thereby to determine the degree to which ring I8 can be turned in opening the doors I3 to a desired degree, Stopdevice 29 (see Fig. 4) has a slot32 therein, and a screw 33, entered through said slot, is engaged in the ring I 8, said screw having a collar 34 that binds against the slot wall when device 29 has been suitably adjusted. Also screw 33 has an axial threaded extension 35 outwardly beyond collar 34, and a clamping nut 36, provided with operating wings 3'I, is screwed upon extension 35 Vand serves to lock device 29 in its adjusted position.

It will be understood that this adjustable stop device is intended for the purpose of providing means for setting a limit to the extent of opening permitted the doors I3. But, if desired to remove the limitation and permit the doors to be opened their full extent, it is only necessary in accomplishing this purpose to throw back the pawl 3U.

Mounted on the front plate 8 is an orificed centre plate 38 from which a tubular portion 39 projects forwardly, and in this tubular portion a burner jacket tube lI-isvtted slidably, said tube being adjustable axially, a locking screw 4I serving to retain it in its adjusted position.

The burner tube 42 is placed in jacket tube 4I) and has the commonly used elements which are well known in the art. Also the burner tube has the usual atcmixing nozzle 43 which is entered within the diffuser 44, said diffuser being carried by jacket tube 4B at its rearward end.

The vanes I5 may either'be formed integral with the doors i3, or they may be pivotally connected therewith, to permit relative angular adjustment between the vanes and doors, and enable the angular direction of the air flow rearwardly to be varied. In Fig. 6 there appears such a pivotal arrangement wherein a vane'IS is adjustably fitted to a door I3 as by a pivotal bolt 45, which latter can be loosened when it is desired to vary the angular adjustment of the vane. The dotted line positions of the vane indicate certain adjusted positions of the vane suitable for the desired air iiow.

From the foregoing description it will be appreciated that air iiow and intermixture with fuel in the register are produced oy curvilinear, scooplike surfaces embodied as integral parts of the air admission doors. These surfaces admit air around the fuel spray, practically entirely in rear of the diffuser, the latter being near the re room end ofthe air scoops. This method of air admission leaves the register throat unincumbered by obstacles that would tend to'hinder air flow, and, as logically would be expected, permit the operation even at an advanced iiring rate with low pressure drop through the register.

It is to be understood that while an atomizing oil burner is represented in the drawings: for discharge of oil in the register in spray formation, other vaporizable fuels or pulverized coal may equally well be employed.

Actually my improved register constitutes a carburetor, because the rearwardly iiowing air, in spiral formation, mingles within the register with the fuel spray leaving the atomizer, thus creating a carbureted mixture in the combustion zone.

Variations withinthe spirit and scope of my inventionA are equally comprehended by the foregoing disclosure.

I claimt- 1. An air register for use with furnaces having a front wall with `an opening therethrough, said register including a base frame having an opening registering with said wall opening, a front plate, a surrounding side wall positioned between said frame and said plate and composed of hinged, inwardly opening, overlapping doors which admit air streams, and vanes carried respectively by said doors, said vanes having curvilinear, scoop-shaped surfaces which direct the entering air streams into a centering and rearwardly moving spiral flow.

`2. A structure as specified in claim 1 in which the vanes are angularly adjustable.

3. A structure as specified in claim 1 in combination with means for controlling the opening and closing of said doors in unison.

4. A structure as specified in claim 1 in cornbination with means for controlling the opening and closing of said doors in unison, said controlling means permitting said doors to close under the iniiuence of internal pressure while preventing their opening under external pressure.

5. An air register for use with furnaces having a front wall with an opening therethrough, said register including a base frame having an opening registering with said wall opening, a front plate, a surrounding side wall positioned between said frame and said plate and composed of hinged, inwardly opening, overlapping doors which admit air streams, vanes carried respectively by said doors, said vanes having curvilinear, scoop-shaped inner surfaces which direct the entering air streams into a centering and rearwardly moving spiral flow, means for controlling the opening and closing of said doors. in unison, and means for limiting the extent to which said doors can be opened.

6. An air register for use with'furnaces having a front wall with an opening therethrough, said register including a base frame having an opening registering with said wall opening, a front plate, in spaced relation to said frame, bolts connecting said frame and said plate, doors which are hinged upon said bolts, said doors when closed having overlapping relation to constitute a surrounding wall for the register, and when open admitting air thereinto with circulatory motion, fuel discharge means centrally projected in said register, a diffuser mounted on said fuel discharge means, and inclined, scoop-like varies carried respectively by said doors that direct the admitted air around the fuel spray, in front of the diffuser.

7. An air register for use with furnaces having a front wall with an opening therethrough, said register including a base frame provided with a tapering throat ring forming an opening registering with said Wall opening, a front plate arranged in spaced relation to said base frame, a plurality of inwardly opening segments disposed between said frame and said plate to constitute a surrounding wall, said segments each provided at its inner surface with means for directing the incoming air streams into a rearwardly moving spiral flow, and fuel discharge means projected axially in said register.

GEORGE P. HAYNES. 

